The Qt Company

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(Redirected from Trolltech)

Qt Group Plc
Company typePublic
Nasdaq HelsinkiQTCOM
IndustryComputer software
Founded4 March 1994 (as Trolltech)
  • Eirik Chambe-Eng
  • Haavard Nord
Area served
Key people
  • Juha Varelius (CEO) (2008-)
  • Jouni Lintunen (CFO) (2020-)
  • Lars Knoll (CTO) (2012-2022)
ProductsQt, Qt Creator, Qbs, PySide, Coco, Squish, Test Center
Revenue180,743,000 Euro (2023) Edit this on Wikidata
47,349,000 Euro (2023) Edit this on Wikidata
35,455,000 Euro (2023) Edit this on Wikidata
Number of employees
775 (2023) Edit this on Wikidata
Nokia Edit this on Wikidata

The Qt Company (pronounced "cute"; formerly Trolltech and Quasar Technologies) is a software company based in Espoo, Finland. It oversees the development of its Qt application framework within the Qt Project. It was formed following the acquisition of Qt by Digia, but was later spun off into a separate, publicly traded company.

It has core R&D in Oslo, Norway, as well as large engineering teams in Berlin, Germany, and Oulu, Finland. The Qt Group operates in China, Finland, Germany, Japan, South Korea, Norway, the US, France, UK, Italy and India.[2]


Trolltech was founded by Eirik Chambe-Eng and Haavard Nord on 4 March 1994. They started writing Qt in 1991, and since then Qt has steadily expanded and improved.

In 2001 Trolltech introduced Qtopia which is based on Qt. Qtopia is an application platform for Linux-based devices such as mobile phones, portable media players, and home media. It is also used in many non-consumer products such as medical instruments and industrial devices. Qtopia Phone Edition was released in 2004, and their Greenphone smartphone is based on this platform.

Trolltech completed an initial public offering (IPO) on the Oslo Stock Exchange in July, 2006.

On 28 January 2008, Nokia Corporation announced that they had entered into an agreement to make a public voluntary tender offer to acquire Trolltech.[4] The total cost for Nokia was approximately €104 million.[5][6] On 5 June 2008 Nokia's voluntary tender offer was approved for all the shares in Trolltech. By 17 June 2008, Nokia had completed its acquisition of Trolltech. On 30 September 2008, Trolltech was renamed as Qt Software, and Qtopia was renamed as Qt Extended. On 11 August 2009, the company's name was changed to Qt Development Frameworks.[7]

Nokia sold the commercial licensing business of Qt to Digia in March 2011.[8] The remainder of the assets were subsequently acquired by Digia in 2012.

In September 2014, Digia formed The Qt Company, a wholly owned subsidiary dedicated to the development and governance of the Qt platform.[9] In May 2016, the company went public on NASDAQ Helsinki as QTCOM.[10]


Qt Group's head office is located in Helsinki, Finland. The company has approximately 800 employees worldwide. [11]

The company’s CEO is Juha Varelius,[12] who previously served as the CEO of Digia from 2008 to 2016.[13]


The company provides software development platforms and frameworks, as well as expert consulting services. Its flagship product is Qt, a multi-platform Graphical User Interface (GUI) framework written in C++. Qt is popular with application developers using C++ but is supported by bindings for other programming languages too, such as Python. Qt also includes packages such as data structures and a networking library. The popular free and cross-platform KDE Plasma desktop environment and software compilation uses the Qt library. The company also employs several KDE developers.


  1. ^ "20 Years of Qt Code". Retrieved 10 June 2016.
  2. ^ a b "Office Locations". Retrieved 15 July 2018.
  3. ^ "The Qt Company Management". Retrieved 10 June 2016.
  4. ^ "Nokia to acquire Trolltech to accelerate software strategy". 28 January 2008. Archived from the original on 4 March 2008. Retrieved 28 January 2008.
  5. ^ "Nokia ostaa norjalaisen ohjelmistoyrityksen" (in Finnish). 28 January 2008. Archived from the original on 29 January 2008. Retrieved 28 January 2008.
  6. ^ "Nokia to buy Trolltech, will become a patron of KDE". 28 January 2008.
  7. ^ "New name, new domain announced for Qt Development Frameworks". 11 August 2009. Archived from the original on 7 January 2012. Retrieved 18 August 2009.
  8. ^ Lawton, Christopher (7 March 2011). "Nokia to Sell Qt Business". The Wall Street Journal.
  9. ^ "Qt hot potato spun out from Digia into fourth home". ZDNet. Retrieved 21 February 2017.
  10. ^ "NASDAQ Helsinki Welcomes Qt Group Plc". Qt Group. 4 May 2016. Archived from the original on 4 June 2016. Retrieved 10 June 2016.
  11. ^ "About The Qt Group - Code Less & Create More". Retrieved 16 May 2024.
  12. ^ "Toimitusjohtaja ja johto". (in Finnish). Retrieved 16 May 2024.
  13. ^ Räisänen, Perttu (16 May 2024). "Suomessa on it-alan menestystarina, joka usein jää unhoon – 2 miljardin markkina-arvo vasta alkusoittoa?". Tivi (in Finnish). Retrieved 16 May 2024.

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